Electric motors

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  • Case Study: Direct Current (DC) Motors

    Direct Current (DC) motors Name: University 1.0 Introduction A Direct Current (DC) motor is one of the broader classification of electric motors which operate from a direct current. Nearly all mechanical devices applied in daily life activities are powered by electric motors. Motors transform electrical energy to mechanical energy, hence they are essential for energy conversions in electrical machines. All types of electrical motors are made up of a stationary field referred to a stator and a rotating field referred to a rotor. According to Krishnan, (2010), DC motors operate through the interaction of an electric current with magnetic flux to generate a torque and rotational speed. D.C motors are of different types but they all operate…

    Words: 980 - Pages: 4
  • Induction Motor Case Study

    1.1 Overview Electric motors are the majority of the industry prime movers. Induction motor is the most popular ones for their reliability and simplicity of construction .although induction motors are reliable they are subjected to some mode of failures. These failures may be inherent to the machine itself or due to operating conditions. The origins of inherent failures are due to mechanical or electrical forces acting in the machine enclosure. Researchers have studied a variety of machine…

    Words: 864 - Pages: 4
  • The Benefits Of Outdoor Kitchens

    resources in prison for those that are not hardened criminals. This would be a relevant program where people could find a job or a program that will help them make sure individuals are capable of supporting their children. Hybrid-Electric Job Site Generator Although world leaders have already taken many steps to reduce dependence on fossil fuels, there persists the need for continued use for the near future. One major technological advance, which allows modern consumers to curb gasoline…

    Words: 2239 - Pages: 9
  • Differences Between Machine And Induction Machine

    Cost Moderate initial cost followed by a higher operating cost and maintenance. High purchasing price; Lower operating cost and good energy saving which cut down operating cost. Table 2 summary of comparison between PM and induction machines losses in electric machines To investigate the efficiency of the machine, an essential part is to evaluate the losses in the motor. Losses in the machine is determined by the structure and working condition. Losses in the machines can generally be…

    Words: 1446 - Pages: 6
  • The Scheatic Analysis Of Direct Flux And Torque Control

    Abstract:It is very important to control the speed of induction motors in industrial and engineering applications. Efficient control strategies are used for reducing operation cost too.This paper presents a direct flux and torque control of three phase induction motor drive using PI and Fuzzy logic controller. The Direct Flux and Torque Control (DTC) is one of the most excellent direct control strategies of stator flux and torque ripple of Induction Motor Drive(IMD). The conventional method of…

    Words: 1483 - Pages: 6
  • Electro Mechanical Actuator Case Study

    How Electro-mechanical Actuator Works? A Rotary Electromechanical Actuation system with an Electric Motor, a gear box & an elastic spring to absorb peak torque loads experienced during operational life. The Schematic below describes the system. Fig. 1.1 Rotary Electro-mechanical Actuator Gearbox Requirements: The Gear Box at the Motor Output is intended to amplify the torque output of the Motor with reduction in speed. The tentative ratio is set at 10:1. Functional Requirements of…

    Words: 2204 - Pages: 9
  • Analysis Of Frequency

    The proposed approach was implemented, tested and validated for SVPWM and DPWM2 techniques, including the over-modulation region. The proposed switching frequency variation strategy was able to reduce switching losses up to 20% over the conventional constant switching frequency SVPWM and DPWM2 techniques. This strategy also spreads peaky harmonic spectrum of the output waveform which may help in reducing acoustic noise, however, consequent introduction of lower frequency harmonics in the…

    Words: 1105 - Pages: 5
  • Case Study Of Rotor And Touchdown Bearing Models

    Rotor and touchdown bearing models Fig. 1 features the case study of the high-speed rotor. The photo was taken after manufacturing of the electric motor part, when the rotor was carried to the laboratory for an experimental modal analysis. During normal operation, the rotor is supported by AMBs. In the dropdown event, the rotor is in contact with touchdown bearings at both ends of the rotor. Fig. 1. Rotor under investigation. In this work, the finite element model of the rotor employs…

    Words: 1417 - Pages: 6
  • The Pros And Cons Of DPWM Schemes

    industrial drives) three-level inverters are used extensively [1]-[2], and recently, their application in low-voltage, high-power traction applications have been introduced [3]-[5]. In these applications, the three-level inverters often need to operate with modulation indices (m) lower than 0.5 [6]- [10]. Additionally, at lower modulation indices, traction drives operating with induction motors (IMs), interior permanent magnet motors (IPMs) or synchronous reluctance motors (SynRMs) may need to…

    Words: 1521 - Pages: 7
  • Raspberry Pi Research Paper

    2.1 OVERVIEW OF PROJECT The project consists of a module that is being used for image processing. This is done by employing a Raspberry Pi development board and the convex hull method. The power source is a 230 V AC supply which is being converted to 12 V AC and then to DC using a rectifier circuit. This is powering the relay circuit that is being employed. A robotic arm with 2 active motors has been used to demonstrate the plenty applications that this technology could be used for. The…

    Words: 1077 - Pages: 5
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